2014-09-27 Some Japanese links of camera and light related things PBR Ev = Av + Tv http://homepage3.nifty.com/alpha-1/photo/ART_EV_J.html http://www.unami-a.com/kiho/exposure_value.shtml Labsphere 社 の Spectralon http://www.labsphere.jp/Spectralon.html RawTherapee ( Raw から Linear Raw を求める ) http://rawtherapee.com/ Dcraw http://www.cybercom.net/~dcoffin/dcraw/ IES Light Collection in RenderMan http://renderman.pixar.com/view/DP25764